docs: def create_initial_category(apps, schema_editor):
      ''' Create a default category for existing discounts '''
      DiscountCategory = apps.get_model('discounts','DiscountCategory')
      db_alias = schema_editor.connection.alias
      DiscountCategory.objects.using(db_alias).create(
          id=1,name='General Discounts',order=1,cannotCombine=False
      )